Transfer case control modules.

Frank144 · December 6, 2023

Anybody have any luck with preprogrammed TCCMs? I have tried two of the preprogrammed modules and neither one of them have worked even though they are supposed to be programmed to my truck vin# (2010 sierra). The first one was a Dorman from Advanced and it did start to sort of work after driving it for a while, it would switch in or out of 4 wheel but it took a long time before it would switch and usually would only switch after a start up, once or twice it did switch out of four wheel while I was driving. Eventually it started to switch in or out without me even changing the switch. Needless to say that was useless I returned it and got a refund. I thought maybe I just got a bad one and decided to try one from Highway71 and installed it and it just won't switch into four wheel like the Dorman in the beginning. I'm not even going to try driving it to see if it will start working. With my original module it became stuck in four wheel and I can get it out of four wheel by removing the 30 amp fuse or into by installing it. Just wondering if these preprogrammed modules work for anyone? I'm assuming they should work. I have also ruled out the actuator and switch as being the problem and also cleaned the ground under the cab driver's side.

oops I just realized I posted this in the wrong section, my truck is a 2010. Sorry about that I'm new this is my first post. Is there a way to move this or delete it?

Edited December 6, 2023 by Frank144
posted in wrong section

Mshawn · December 9, 2023

On 12/6/2023 at 9:49 AM, Frank144 said:

Anybody have any luck with preprogrammed TCCMs? I have tried two of the preprogrammed modules and neither one of them have worked even though they are supposed to be programmed to my truck vin# (2010 sierra). The first one was a Dorman from Advanced and it did start to sort of work after driving it for a while, it would switch in or out of 4 wheel but it took a long time before it would switch and usually would only switch after a start up, once or twice it did switch out of four wheel while I was driving. Eventually it started to switch in or out without me even changing the switch. Needless to say that was useless I returned it and got a refund. I thought maybe I just got a bad one and decided to try one from Highway71 and installed it and it just won't switch into four wheel like the Dorman in the beginning. I'm not even going to try driving it to see if it will start working. With my original module it became stuck in four wheel and I can get it out of four wheel by removing the 30 amp fuse or into by installing it. Just wondering if these preprogrammed modules work for anyone? I'm assuming they should work. I have also ruled out the actuator and switch as being the problem and also cleaned the ground under the cab driver's side.

oops I just realized I posted this in the wrong section, my truck is a 2010. Sorry about that I'm new this is my first post. Is there a way to move this or delete it?

Your module may not be the problem …. It may be the switch itself.

Frank144 · December 9, 2023

15 hours ago, Mshawn said:

Your module may not be the problem …. It may be the switch itself.

I replaced the switch with a new one which acts just like the old one. I'm looking into the transfer case position sensor which I didn't know about until yesterday. I'm really hopeful that could be the issue, not very expensive either and looks pretty easy to change. From a video I watched about replacing the transfer case motor it looks like that position sensor is right next to the motor.